adding code to support seccomp apparmor securityprofile

Signed-off-by: Mike Brown <brownwm@us.ibm.com>
This commit is contained in:
Mike Brown
2020-11-06 17:49:35 -06:00
parent f1295043eb
commit b4727eafbe
3 changed files with 193 additions and 9 deletions

View File

@@ -307,7 +307,8 @@ func (c *criService) containerSpecOpts(config *runtime.ContainerConfig, imageCon
specOpts = append(specOpts, customopts.WithAdditionalGIDs(userstr))
apparmorSpecOpts, err := generateApparmorSpecOpts(
securityContext.GetApparmorProfile(),
securityContext.GetApparmor(),
securityContext.GetApparmorProfile(), // nolint:staticcheck deprecated but we don't want to remove yet
securityContext.GetPrivileged(),
c.apparmorEnabled())
if err != nil {
@@ -318,7 +319,8 @@ func (c *criService) containerSpecOpts(config *runtime.ContainerConfig, imageCon
}
seccompSpecOpts, err := c.generateSeccompSpecOpts(
securityContext.GetSeccompProfilePath(),
securityContext.GetSeccomp(),
securityContext.GetSeccompProfilePath(), // nolint:staticcheck deprecated but we don't want to remove yet
securityContext.GetPrivileged(),
c.seccompEnabled())
if err != nil {
@@ -331,12 +333,12 @@ func (c *criService) containerSpecOpts(config *runtime.ContainerConfig, imageCon
}
// generateSeccompSpecOpts generates containerd SpecOpts for seccomp.
func (c *criService) generateSeccompSpecOpts(seccompProf string, privileged, seccompEnabled bool) (oci.SpecOpts, error) {
func (c *criService) generateSeccompSpecOpts(sp *runtime.SecurityProfile, seccompProf string, privileged, seccompEnabled bool) (oci.SpecOpts, error) {
if privileged {
// Do not set seccomp profile when container is privileged
return nil, nil
}
if seccompProf == "" {
if seccompProf == "" && sp == nil {
seccompProf = c.config.UnsetSeccompProfile
}
// Set seccomp profile
@@ -348,8 +350,33 @@ func (c *criService) generateSeccompSpecOpts(seccompProf string, privileged, sec
if seccompProf != "" && seccompProf != unconfinedProfile {
return nil, errors.New("seccomp is not supported")
}
if sp != nil {
if sp.ProfileType != runtime.SecurityProfile_Unconfined {
return nil, errors.New("seccomp is not supported")
}
}
return nil, nil
}
if sp != nil {
if sp.ProfileType != runtime.SecurityProfile_Localhost && sp.LocalhostRef != "" {
return nil, errors.New("seccomp config invalid LocalhostRef must only be set if ProfileType is Localhost")
}
switch sp.ProfileType {
case runtime.SecurityProfile_Unconfined:
// Do not set seccomp profile.
return nil, nil
case runtime.SecurityProfile_RuntimeDefault:
return seccomp.WithDefaultProfile(), nil
case runtime.SecurityProfile_Localhost:
// trimming the localhost/ prefix just in case even through it should not
// be necessary with the new SecurityProfile struct
return seccomp.WithProfile(strings.TrimPrefix(sp.LocalhostRef, profileNamePrefix)), nil
default:
return nil, errors.New("seccomp unknown ProfileType")
}
}
switch seccompProf {
case "", unconfinedProfile:
// Do not set seccomp profile.
@@ -367,15 +394,52 @@ func (c *criService) generateSeccompSpecOpts(seccompProf string, privileged, sec
}
// generateApparmorSpecOpts generates containerd SpecOpts for apparmor.
func generateApparmorSpecOpts(apparmorProf string, privileged, apparmorEnabled bool) (oci.SpecOpts, error) {
func generateApparmorSpecOpts(sp *runtime.SecurityProfile, apparmorProf string, privileged, apparmorEnabled bool) (oci.SpecOpts, error) {
if !apparmorEnabled {
// Should fail loudly if user try to specify apparmor profile
// but we don't support it.
if apparmorProf != "" && apparmorProf != unconfinedProfile {
return nil, errors.New("apparmor is not supported")
}
if sp != nil {
if sp.ProfileType != runtime.SecurityProfile_Unconfined {
return nil, errors.New("apparmor is not supported")
}
}
return nil, nil
}
if sp != nil {
if sp.ProfileType != runtime.SecurityProfile_Localhost && sp.LocalhostRef != "" {
return nil, errors.New("apparmor config invalid LocalhostRef must only be set if ProfileType is Localhost")
}
switch sp.ProfileType {
case runtime.SecurityProfile_Unconfined:
// Do not set apparmor profile.
return nil, nil
case runtime.SecurityProfile_RuntimeDefault:
if privileged {
// Do not set apparmor profile when container is privileged
return nil, nil
}
return apparmor.WithDefaultProfile(appArmorDefaultProfileName), nil
case runtime.SecurityProfile_Localhost:
// trimming the localhost/ prefix just in case even through it should not
// be necessary with the new SecurityProfile struct
appArmorProfile := strings.TrimPrefix(sp.LocalhostRef, profileNamePrefix)
if profileExists, err := appArmorProfileExists(appArmorProfile); !profileExists {
if err != nil {
return nil, errors.Wrap(err, "failed to generate apparmor spec opts")
}
return nil, errors.Errorf("apparmor profile not found %s", appArmorProfile)
}
return apparmor.WithProfile(appArmorProfile), nil
default:
return nil, errors.New("apparmor unknown ProfileType")
}
}
switch apparmorProf {
// Based on kubernetes#51746, default apparmor profile should be applied
// for when apparmor is not specified.